I just wanted to point out the some riggers are ready to repack old parachutes that the manufacturer says have a life limit but not old AAD that the manufacture decided to give a life limit so he could sell more AADs.

AADs are not TSOd so they are outside the purview of the FAA. It is up to the manufacturer to indicate which AAD is compatible with their system.

What is binding is that the FAA say AADs are compatible only if maintained in accordance with the AAD manufacturer's instructions and guidelines.

So Airtec, for example, can put a 12 year life on their AAD and once it has lifed out it cannot legally be used in a skydiving rig.